Table 1.

Comparison of the stepwise coupling efficiencies of l‐ and d‐DNA phosphoramidites (in %).

Phosphoramidite	dA	dC	dG	dT
5′‐NPPOC l‐DNA	99.9	99.9	98.3	99.9
5′‐BzNPPOC d‐DNA	99.9	99.9	97.0	99.9